Pressure-release.



mamm- PRESSURE Rama APPLICATION FILED M1639, H56

mmm M5, 1918.

2 SHEETS-SHEET I straws ROLLIN L. BACHER, 0F CLEVELAND, OHIO, ASSIG-N'OR TO THE UNITED STATES AIR COMPRESSOR COMPANY, OF CLEVELAND, OHIO, A CORPORATION 01 OHIO.

' PRESSURE-RELEASE.

To all whom it may concern:

Be it known that I, BOLLIN L. BAcHEa, a citizenof the United States, and a resident of Cleveland, county of Cuyahoga, and Stateof Ohio, have invented new and useful Improvements in Pressure-Releases, of which the following is a specification, the principle of the invention being hereinexplained and, the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

My IlIIVGIllJlOll relates to pressure releases and particularly to that class of such devices which is used in connection with air compressors, whereby the danger of burning out fuses or motors or the throwing oil of belts, etc., may be eliminated, since by the use of .my device it is not necessary for the compressor to start against the tank pressure. The annexed drawings and the following description set forth in detail certain means embodying my invention, such disclosed means, however, constituting but one of the various forms in which the principles of my invention may be utilized.

In said annexed drawings:

Figure l'represents a front elevation of .my invention, showing the connection thereof with an air compressor and a motor; Fig. 2 represents upon an enlarged scale a broken front elevation of my invention and Fig. 3

represents a central transverse vertical sec tion thereof, both with some cooperating parts ofa standard motor design adapted to be utilized in the operation of my invention; and'Fig. 4 represents. a suggestion of such motor in its entirety, particularly showing in detail such parts thereof as affect the operation of my improved release.

Referring to Fig. 1, the air compressor is represented by the numeral 1 with the base 2 from which is released by my improved pressure release the tank pressure before and until the motor operating the compressor at tains full operation. An air conduit 3 communicates with the air chamber of the base 2. A motor 4.With a front bearing bracket 5 is shown in Figs. 1 and 4. Describing now in detail my improved pressure release itself by'means of which the pressure is eliminated from the tank in the base 2 through the-conduit 3, such invention comprises a movable rod 9 having an angular end 10, which rod is actuated by the parts Specification of Letters Patent.

Application filed August'29, 1916.

Patented Feb. a, rain. Serial no. 117,436.-

6, 33, 341-, and other connected parts of a standard motor design, in that exernplifica tion of. the principles of my invention Which is shown in the annexed drawings, as here-- inafter fully described. Said rod 9 is seecured to a rocker arm 21 by a screw 22, said rocker arm 21 being pivoted between the shoulders 13 of a bracket 11, which is sup ported upon. the front bearing bracket 5 of the motor frame. Secured to the rocker arm 21 by the screw 24: is a spring Inember 23.

The outer section 25 of the air conduit 3 is provided with an enlarged end portion 27, within which is a reduced bore 28 communicating with the bore 26 of the air conduit proper. This enlarged end portion 27 is retained bymeans of the screw 18 within the bore 15 of the valve casing 14 which is formed integrally with and as a transversely extending portion of the upwardly extendlng member 12 of the bracket 11. An exterior air passage 17 intersects the bore 15 of the valve casing 14. Contained withn said bore 15 is apl'unger 19 having a reduced end portion 20 intersecting thewall of the casing 14 and protruding outwardly from said tending slightly outwardly from the plungel 19 and being slightly depressed to receive the conical extension 29 and the fiber material 29, as is plainly seen in Fig. 3, and

contacting with said material 29, when the plunger 19 is in its innermost position, immediately below the air outlet 17.

I shall now describe in detail certain features of a standard motor design, which forms no part of my invention, but whose operation automatically effects the neces sary movements of the parts of my improved pressure release to cause the latter to act as a safety device against the burning out of fuses or the motor or the throwing off of belts, etc. A barrel ring or shell 6 is contained within the bore of the brush-holder 31, Fig. t, and is movable longitudinally therein. The carbon brushes are reprecasing and adapted to contact with the aforementioned spring member 23.

barrel ring 6 to be weights 4E1.

sented at 32. With each of said brushes are provided a pair of parallel motion links 33 pivotedto a bracket 7 secured to the motor frame, which links support a parallel motion finger 34 adapted to be impinged upon by the shell 6 as the latter moves to its outer position, and to ride over and bear upon the top of said shell when the latter reaches 1ts outermost position, Fig. 4. Pivoted short circuiting segments represented at 35 are carried exteriorly of a longitudinally movable spring barrel 36 which is adapted to actuate the shell 6. The movement of the barrel 36 in one direction is effected by the spring 37 and in the other by the pins 38, one of which is shown, which pins areactuated by means of the bell crank 39, the governor weight links 40 and the governor commutator segments insulator rings 43, commutator rings 44, commutator head 45, armature 46, and field 47, are all plainly shown in Fig. 4.

From the foregoing description and the accompanying drawings it is evident that the stopping of the motor will cause the moved longitudinally through the agency of the spring barrel 36, and the parts which actuate the latter, to its innermost position, thereby releasing the parallel motion finger 34 which is adapted to contact with and actuate the movable rod 9 when said finger is moved outwardly by the barrel ring 6, so that the release of said finger 34 and consequent release ofrod 9 permits the inward movement of the latter through the agency of the rocker arm 21, spring member 23 and plunger 20. it is evident that this necessary outward movement of the plunger 20 to cause the inward movement of the rod 9 is effected by the impinging of the air pressure from the conduit 3 upon the material 30, causing the plunger 19 to move outwardly within the ore 15. It is evident that the member 23, being comprised of spring material, will compensate for any wearing of the parts and thus prevent any leakage.

By the action of my improved device as hereinbefore explained, it is not necessary to cause the motor to start against tank pressure, but the same can be started normally and when it has reached full operation, then through the action of the governor weights 41 and the intermediate connective elements to the barrel ring 6, the parallel motion finger 34 moves the rod 9 outwardly, causing the spring member 23 through the agency of the rocker arm 21 to force the plunger 19 inwardly thus forming-an air tight joint at the juncture of the fiber materials 29 and 30.

I have hown and. described the operation of-my improved pressure release by means of a standard motor device and by locating said release upon the frame of said motor merely as illustrative of the principles of my invention which are the automatic actuation of the release by the means which actuate the air compressor, which actuating means might be any one of the various mech anisms used for this purpose, and the location of the release with reference to the actuating means might be in any one of various positions.

What 1 claim is:

1. In apparatus of the character described, the combination with a motor, an air compressor and a suitable chamber for retaining the air under pressure; of an air conduit communicating with said chamber; motor parts actuated to an extreme position when the motor attains full operation; a bracket; means for supporting the latter; an element pivoted in said bracket and adapted to be actuated by said motor parts when the latter reach said extreme position; a chamber formed in said bracket and provided with an opening communicating with said air conduit; and a reciprocating plunger mounted in said chamber and adapted to be actuated by said pivoted element to close said opening in said chamber.

2. In apparatusof the character described, the combination with a motor, an air compressor and a-suitable chamber for retaining the air under pressure; of an air conduit communicating with said chamber; a reciprocating shell member adapted to be actuated by the governor of the motor in-one direction; means for moving saiu shell member in the other direction; a valve casing communicating with said conduit; a plunger in'said valve casing, said plunger normally closing thevcommunication between said valvecasing and air conduit, said plunger being provided with a reduced end portion protruding from said valve casing; a rocker arm; a. spring member supported upon said rocker arm and adapted to impinge upon the reduced end portion of said plunger; a movable element adapted to be actuated by the movement of said shell member in the first-mentioned direction and adapted to actuate said rocker arm; and supporting means for said valvecasing, rocker arm and movable element.

In testimony whereof, I have signed this specification on this 15th day of Allg'llSiL, 1916.

, ROLLIN n BAoHER.

Witnesses:

ANNA MCNAMEE, ANNA M. CURRY. 

